messagebox causes poor responsiveness windows phone 8

Question

When I run my app in store test kit (Automated test-Windows phone application analysis) I get a red mark near responsiveness as app responsiveness is poor, I am using a background thread to call a web service and display a messagebox with particular result from web service. I have tried using separate thread and dispatcher for displaying the message box, still I get the same results in store kit.I am sure that other parts of my code are not causing it, when I comment out messagebox.show(), the app passes responsiveness test. There is one more link I found relevant http://social.msdn.microsoft.com/Forums/wpapps/en-us/dfd3bc28-6a90-4a77-92f7-c42982eafa40/app-poor-responsiveness-in-wp7?forum=wpdevelop it says this would not affect the certification process,Can some one please confirm this or provide more details of how do I go about making my app responsive?

Answer 1

Message boxes are synchronous, when you display one then the UI thread stops processing the other elements of your interface. That why an automated testing tool will detect it as a lack of responsiveness, even though it's on purpose. Don't worry about it, it won't affect the certification process.